Fan Module for Neck-Mounted Fans, Portable Fan Based on High-Speed Three-Phase Motors, and Neck-Mounted Fan

Abstract

The present application relates to the field of fan, a portable fan is specifically designed, featuring the technical advantages of high efficiency, low noise, and adjustable wind speed.

1 . A fan module for a neck fan, comprising:
 a fan housing;   a connecting piece, arranged inside the fan housing and provided with a fan channel; and   a fan assembly, sleeved on the connecting piece and connected to the connecting piece through a rotating shaft.   
     
     
         2 . The fan module according to  claim 1 , wherein the fan housing is made of a plastic material; the fan assembly comprises a motor assembly, a fan blade assembly, and a buffering component arranged inside the fan housing; one end of the motor assembly is connected to the connecting piece, and the fan blade assembly is sleeved on the motor assembly, the buffering component is arranged between the fan blade assembly and the connecting piece. 
     
     
         3 . The fan module according to  claim 1 , wherein the connecting piece comprises a connecting ring and multiple connecting plates, wherein the multiple connecting plates are arranged around the connecting ring, one end of each connecting plate of the multiple connecting plates is connected to an inner surface of the fan housing, and another end of each connecting plate is connected to the connecting ring;
 the fan assembly comprises a motor assembly and a fan blade assembly, an end of each connecting plate facing the fan blade assembly is curved and extended towards the fan blade assembly to form multiple air guide plates, a gap is defined between the air guide plates and the fan assembly, and a curvature direction in which an end of the multiple air guide plates curves is opposite to a rotation direction of the fan blade assembly.   
     
     
         4 . The fan module according to  claim 3 , wherein an end of the motor assembly is connected to the connecting piece, and the fan blade assembly is sleeved on the motor assembly;
 the fan blade assembly comprises a hub and multiple fan blades, wherein the multiple fan blades are arranged around an outer surface of the hub in a circumferential direction of the hub;   the fan module further comprises a flexible housing, wherein the fan housing is arranged inside the flexible housing.   
     
     
         5 . The fan module according to  claim 4 , wherein the blade spacing between adjacent two blades in the multiple blades gradually increases along the air outlet direction of the fan component; Each of the multiple blades comprises a first end and a second end opposite to the first end, wherein the length of the first end is greater than the length of the second end, and each blade is provided with a blade edge. The thickness of each blade gradually increases from the first end to the blade edge direction, and gradually decreases from the blade edge to the second end direction. 
     
     
         6 . The fan module according to  claim 4 , wherein the fan housing is in a cylindrical shape, and a ratio of an inner diameter of the fan housing to a maximum diameter of the fan blade assembly ranges from 1.01 to 1.15; the hub comprises a top surface, a bottom surface, and a side surface, a cross-sectional area of the bottom surface is larger than that of the top surface, and a transition between the top surface and the side surface is smooth. 
     
     
         7 . The fan module according to  claim 1 , further comprising an assembly base, wherein the assembly base comprises: a base and a connecting column, wherein the base is connected to the connecting piece, the connecting column is connected to the base, and the fan assembly is sleeved on and connected to the connecting column;
 the connecting column is provided with a connecting hole, and two ends of the connecting hole are respectively provided with a first bearing and a second bearing, the rotating shaft is inserted into and passes through the first bearing and the second bearing, and an end of the rotating shaft passing through the second bearing is provided with a securing slot and a circlip is connected to the securing slot.   
     
     
         8 . A portable fan based on a high-speed three-phase motor, comprising a control module, a drive module, and a high-speed three-phase motor, wherein a working voltage of the high-speed three-phase motor is  2  to 18 volts, and a working current of the high-speed three-phase motor is 0.1 to 10 amperes;
 the control module controls a rated rotating speed of the high-speed three-phase motor through the driving module based on the working voltage and the working current, so as to reduce high-speed noise of the high-speed three-phase motor and to control a wind speed to be within a preset wind speed range. 
 
     
     
         9 . The portable fan according to  claim 8 , wherein a rated operating power of the high-speed three-phase motor is 0.5 to 100 watts;
 the control module controls the rated rotating speed of the high-speed three-phase motor through the driving module based on the rated working power, so as to reduce the high-speed noise of the high-speed three-phase motor and to control the wind speed to be within the preset wind speed range;   wherein, the portable fan includes a neck fan, a handheld fan, or a desktop fan.   
     
     
         10 . The portable fan according to  claim 8 , wherein a rated operating power of the high-speed three-phase motor is 0.5 to 100 watts;
 the control module controls the rated rotating speed of the high-speed three-phase motor through the driving module based on the rated working power, so as to reduce the high-speed noise of the high-speed three-phase motor and to control the wind speed to be within the preset wind speed range;   wherein, the preset wind speed range of the portable fan is above 4 meters per second.   
     
     
         11 . The portable fan according to  claim 8 , wherein the control module controls according to the operating voltage and current. The control module directs the drive module to control the rated speed of the high-speed three-phase motor, ranging from 2000 to 85000 RPM/MIN. 
     
     
         12 . The portable fan according to  claim 8 , wherein the portable fan further comprises an input module, the input module is connected to the control module, and the driving module comprises a first bridge arm, a second bridge arm, and a third bridge arm; a midpoint of each of the first, second, and third bridge arms includes an upper bridge arm switching tube and a lower bridge arm switching tube on both sides, and a midpoint of each of the first, second, and third bridge arms is connected to a phase coil of the motor;
 the input module outputs a wind speed adjustment control signal according to user instructions, and the control module generates a PWM control signal based on the wind speed adjustment control signal, and controls switching tubes of each of the first, second, and third bridge arms through the PWM control signal to adjust a rotating speed of the high-speed three-phase motor.   
     
     
         13 . The portable fan according to  claim 8 , comprising:
 a wind guide cover, wherein an air inlet is provided on the wind guide cover;   an air duct is provided with an air outlet corresponding to the air inlet, and an end of the air duct facing away from the air outlet is connected to an end of the air cover facing away from the air inlet;   the fan assembly is connected inside the air duct, and at least a portion of structures of the fan assembly extends out of the air duct and extends into the wind guide cover.   
     
     
         14 . The portable fan according to  claim 13 , wherein the fan assembly comprises a motor assembly and a fan blade assembly, an end of the motor assembly is connected to the air duct, and the fan assembly is sleeved on the motor assembly;
 the air duct comprises: an air guide shell, a storage cylinder, and multiple air guide plates, the storage cylinder is arranged inside the air guide shell, and the multiple air guide plates are arranged around a circumference of the storage cylinder, an end of the multiple air guide plates is connected to an inner surface of the air guide shell, and another end of the multiple air guide plates is connected to the storage cylinder, the air guide shell is connected to the wind guide cover, and the motor assembly is connected to the storage cylinder; the air guide shell together with the storage cylinder and the multiple air guide plates define the air outlet.   
     
     
         15 . The portable fan according to  claim 14 , wherein the motor assembly comprises a rotating shaft, a coil, and a magnetic ring, wherein a connecting portion is provided on the storage cylinder, an end of the rotating shaft is connected to the connecting portion, and another end of the rotating shaft is connected to the fan blade assembly, the coil is provided on the connecting portion, the magnetic ring is provided on the fan blade assembly, and the magnetic ring is sleeved on the coil. 
     
     
         16 . A neck fan, comprising a fan motor, a ventilation channel, and a first air inlet and a first air outlet connected to the ventilation channel, the fan motor is installed inside the ventilation channel and operates to form an airflow through the ventilation channel between the first air inlet and the first air outlet; at least two silencing devices are installed in the ventilation channel, with at least one silencing device located between the first air inlet and the fan motor, and at least another silencing device located between the fan motor and the first air outlet. 
     
     
         17 . The neck fan according to  claim 16 , wherein the fan motor comprises a motor housing, wherein a fan channel is provided inside the fan housing, and the fan motor further comprises an impeller and a high-speed three-phase motor arranged inside the fan channel, the impeller is connected to a rotating shaft of the high-speed three-phase motor, and the high-speed three-phase motor drives the impeller to rotate to form an airflow in the fan channel;
 the motor housing comprises an air inlet end and an air outlet end, and the silencing devices are arranged at the air inlet end and the air outlet end respectively.   
     
     
         18 . The neck fan according to  claim 16 , wherein the fan motor comprises a motor housing, wherein a fan channel is provided inside the fan housing, and the fan motor further comprises an impeller and a high-speed three-phase motor arranged inside the fan channel, the impeller is connected to a rotating shaft of the high-speed three-phase motor, and the high-speed three-phase motor drives the impeller to rotate to form an airflow in the fan channel;
 the motor housing comprises an air inlet end and an air outlet end, and the silencing devices are located adjacent to the air inlet end and the air outlet end respectively.   
     
     
         19 . The neck fan according to  claim 17 , wherein a distance between the silencing device and the air inlet end is 0.1-0.7 times an inner diameter of the motor housing;
 a ratio of the inner diameter of the motor housing to a maximum outer diameter L 1  of the impeller ranges from 1.01 to 1.15.   
     
     
         20 . The neck fan according to  claim 17 , wherein a distance between the silencing device and the air outlet end is 0.1-0.7 times the inner diameter of the motor housing, and an outer diameter L 2  of the impeller is 14 mm-30 mm. 
     
     
         21 . The neck fan according to  claim 17 , wherein the impeller comprises a hub and fan blades arranged around a circumference of the hub, the hub is connected to the rotating shaft of the high-speed three-phase motor, a ratio of an outer diameter of the hub to an outer diameter of the impeller is 0.5-0.8, and projections of the adjacent fan blades along the airflow direction at least partially overlap. 
     
     
         22 . The neck fan according to  claim 16 , wherein the ventilation channel comprises a first air duct and a second air duct, the fan is arranged in the second air duct, a second air outlet is arranged at an end of the second air duct adjacent to the first air duct, the first air inlet is arranged at an end of the second air duct away from the second air outlet, the first air duct is arranged at the first air outlet, and at least two silencing devices are arranged in the ventilation channel, at least one silencing device is arranged on an inner wall of the second air duct adjacent to the first air inlet, and at least one silencing device is arranged on the inner wall of the second air duct adjacent to the second air outlet. 
     
     
         23 . The neck fan according to  claim 22 , wherein each silencing device comprises a support member and a silencing member, wherein the support member is provided between an inner wall of the ventilation channel and the silencing member;
 the support member is a circular structure, and a space is defined between the support member and the inner wall of the ventilation channel to accommodate at least a portion of the silencing member.   
     
     
         24 . The neck fan according to  claim 22 , wherein each silencing device comprises a support member and a silencing member, and the silencing member is arranged on the support member;
 the support member is a circular structure, and a space is defined between the support member and the inner wall of the ventilation channel to accommodate at least a portion of the silencing member.